SHARE-BASED COMPENSATION PLANS - Non-vested Nonqualified Stock Options (Details) - $ / shares shares in Millions	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Number of Shares
Granted (in shares)	19.4	5.9	9.3
Weighted Average Grant Date Fair Value
Granted (in dollars per share)	$ 2.87	$ 4.87	$ 6.34
Nonqualified Options
Number of Shares
Non-vested, beginning balance (in shares)	11.7
Granted (in shares)	19.4
Forfeited (in shares)	(4.3)
Non-vested, ending balance (in shares)	26.8	11.7
Weighted Average Grant Date Fair Value
Non-vested, beginning balance (in dollars per share)	$ 5.60
Granted (in dollars per share)	2.87
Forfeited (in dollars per share)	5.03
Non-vested, ending balance (in dollars per share)	$ 3.72	$ 5.60